The month of June 2008 was slightly warmer and wetter than normal. The first half of the month was unseasonably warm, with near to slightly below normal temperatures during its latter half. The change came around the 16th when upper air high pressure developed over Western North America. This turned winds aloft into the northwest, permitting storm systems and cold fronts to reach the region. Compared with June 2007, the month was 2.2 deg. Warmer, and 3.40 inches drier. During that month, the extremely wet first half of 2007 was approaching its peak and end. Year-to-date rainfall through June 30 was 7.28 inches less in 2008 than in 2007. The thirty-day outlook for June 2008 had called for near normal temperatures and near normal precipitation.
The week June 1-7 saw temperatures about 6 degrees above normal and rainfall less than 5 percent of normal. Upper air high pressure controlled the region for the entire week. During its latter half, strong low pressure over the Southern Plains resulted in very windy conditions, and high nighttime temperatures. A minor disturbance on the 6th brought some widely scattered showers. The week's average temperature was 83.9, which was 4.6 deg. Warmer than the previous week. Rainfall was 0.02 inch. Compared with the same week in 2007, the week was 4.5 deg. Warmer, and 1.11 inches drier.
The week June 8-14 saw temperatures about 3 degrees warmer than normal, and rainfall about one-third normal. The upper air high pressure ridge weakened slightly. This permitted weak cold fronts to go stationary in the area on the 10th and 14th, bringing the week's rainfall. There was both severe weather and flooding rains over the northern half of the region on each of those mornings. A weak sea-breeze front brought widely scattered showers to the south on the 12th and 13th. The week's average temperature was 81.9 deg., which was 2.0 deg. Cooler than the previous week. Compared with the same week in 2007, the week was 1.5 deg. Warmer, and 1.37 inches drier.
The week June 15-21 saw near normal temperatures and rainfall about 250 percent of normal. Upper air high pressure shifted to the west of the region around the 15th. This set up northwest winds aloft over the Plains, which permitted the southward movement of cold fronts and storm systems. This resulted in thunderstorms in the region on the 17th, 19th, and 20th. The presence of slightly cooler air and the showers held down temperatures. The week's average temperature was 80.9 deg., and rainfall was 1.97 inches. This was 1.0 deg. Cooler than the previous week. Compared with the same week in 2007, the week was 1.0 deg. Warmer, and 1.29 inches wetter.
The week June 22-28 saw near normal temperatures and near normal precipitation. Winds aloft continued northwesterly through the week. This brought drier air into the region early in the week permitting comfortable nighttime temperatures. A disturbance crossing on the 24th brought rain and thunderstorms to much of the area. Temperatures warmed late in the week ahead of another disturbance crossing on the 28th and 29th which brought additional rainfall and cooler temperatures. The week's average temperature was 81.1 deg., which was 0.2 deg. Warmer than the previous week. Rainfall was 0.63 inch. Compared with the same week in 2007, the week was 2.1 deg. Warmer, and 4.35 inches drier.
The final two days of the month saw slightly below normal temperatures. A cold front and storm system crossed on the night of the 28th, with heavy rainfall over much of the region including some flooding and severe weather. Cooler and drier air building in behind the front lowered temperatures. Compared with the same week in 2006, the week was 0.6 deg. Cooler. There was no rain during the week in 2006.
The reporting period for temperatures and phenomenon on each day is for the twenty-four hours ending at midnight hours GMT--6 p.m. CST and 7 p.m. CDT. The reporting period for precipitation is for the twenty-four hours ending at noon GMT--6 a.m. CST and 7 a.m. CDT. All times are given using the twenty-four hour clock, and are expressed in Greenwich Mean Time.
Observations are from NWS Station 41/9207/4 in Tyler, Texas. The term "normal" refers to averages from the standard climatic period 1971-2000.
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June 2008, RECORDS AND SUMMARY: